What role did the Hun tribes play in the history of China?

Faced with the lightning raids of the Huns, the Chinese empire began to build fortified fortresses and defenses for cities. The Huns plundered undefended places and quickly retreated; the Chinese army could not always catch up with them. Chinese rulers began to create light cavalry to fight the Huns. Qin Shi Huang, considered the unifier of China, ordered the construction of the famous Great Wall of China.
The emperors of China often made incursions into the lands of the Huns, to which the Huns responded with raids.
As a result, China, at the cost of great efforts, managed to defeat the Huns.
Results: depletion of China’s resources, China enters the international arena, construction of the Great Wall and many other fortifications, modernization of the Chinese army (the appearance of regular cavalry).